Justification:
This species has a very large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

The global population size has not been quantified, but the species is reported to be scarce to locally common (Baker 1997), while national population sizes have been estimated at c.10,000-100,000 breeding pairs in China, c.10,000-100,000 breeding pairs in Taiwan (Brazil 2009).

Trend Justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.

In-Place Research, Monitoring and Planning Action Recovery plan:No Systematic monitoring scheme:NoIn-Place Land/Water Protection and Management Conservation sites identified:Yes, over entire range Occur in at least one PA:Yes Invasive species control or prevention:NoIn-Place Species Management Successfully reintroduced or introduced beningly:No Subject to ex-situ conservation:NoIn-Place Education Subject to recent education and awareness programmes:No Included in international legislation:No Subject to any international management/trade controls:No